Alexandre Froger

<p>Add Two-Factor Authentication, Passwordless Authentication and Account Validation to your WordPress website.</p>
<h3>Overview</h3>
<p>This plugin adds the following major features to WordPress:</p>
<ul>
<li><strong>3 One-Time Password modes</strong>: Two-Factor Authentication, Passwordless Authentication and Account Validation.</li>
<li><strong>3 Authentication Gateways for OTP Verification Codes:</strong> WordPress Email, Twilio SMS, Alibaba Cloud SMS ; all with option to use a sandbox mode.</li>
<li><strong>Two-Factor Authentication:</strong> allow (or force) users to authenticate with a second factor on top of their password.</li>
<li><strong>Passwordless Authentication:</strong> allow users to login simply with their username, an identifier, and an OTP Verification Code (identifier depending on the Authentication Gateway – email or phone number supported with the default gateways).</li>
<li><strong>Account Validation:</strong> force users to validate their account by entering an OTP Verification Code at first login, on a set regular basis at login, or at each login.</li>
<li><strong>Synchronize OTP identifiers with existing data:</strong> wish to use Twilio SMS, but already have a phone number field saved in database? Perhaps with the “Billing Phone” in WooCommerce? Use this field by indicating its user meta key in the gateway settings (Note: duplicate identifiers will require users to choose a different one on update).</li>
<li><strong>Simple yet customizable appearance:</strong> forms used to request OTP Verification Codes use a neutral dedicated style compatible with most themes, with customizable logo and call-to-action colors.</li>
<li><strong>Activity Logs:</strong> when enabled, administrators can follow the activity of the enabled gateway. Critical messages regarding gateway malfunction are always logged.</li>
<li><strong>Customizable for developers:</strong> developers can add their own gateways or add custom One-Time Password modes using action and filter hooks, and more – see the <a href="https://github.com/froger-me/otp-authenticator" rel="nofollow ugc">developers documentation</a>.</li>
<li><strong>Integration-friendly:</strong> specific integration with Ultimate Member and WooCommerce is included by default ; developers can easily plug into OTP Authenticator with a multitude of functions, filter hooks and action hooks – see the <a href="https://github.com/froger-me/otp-authenticator" rel="nofollow ugc">developers documentation</a> – contributions to integrations are welcome.</li>
<li><strong>Unlimited features:</strong> there are no premium version feature restrictions shenanigans – OTP Authenticator is fully-featured right out of the box.</li>
</ul>
<h3>Troubleshooting</h3>
<p>OTP Authenticator is regularly updated, and bug reports are welcome, preferably on <a href="https://github.com/froger-me/otp-authenticator/issues" rel="nofollow ugc">Github</a>, especially for advanced troubleshooting.</p>
<p>Each <strong>bug</strong> report will be addressed in a timely manner, but general inquiries and issues reported on the WordPress forum may take significantly longer to receive a response.</p>
<p><strong>Only issues occurring with included integrated plugins (or plugin features), core WordPress and default WordPress themes (incl. WooCommerce Storefront) will be considered without compensation.</strong></p>
<p><strong>Troubleshooting involving 3rd-party plugins or themes will require compensation in any case, and will not be addressed on the WordPress support forum</strong>.</p>
<h3>Integrations</h3>
<p>Although OTP Authenticator is designed to work out of the box with most combinations of WordPress plugins and themes, there are some edge cases necessitating integration, with code included in the core files of OTP Authenticator executing under certain conditions.</p>
<p>Integrations added to core are limited to popular plugins and themes: any extra code specific to a handful of installations require a separate custom integration plugin not shared with the community (decision at the discretion of the OTP Authenticator plugin author).</p>
<p>If such need for plugin integration arises, website administrators may contact the author of OTP Authenticator to become a patron.</p>
<p><strong>All integrations are to be funded by plugin users, with downpayment and delivery payment, at the plugin author’s discretion, without exception</strong>.<br />
The patron in return may be credited with their name (or company name) and a link to a page of their choice in the plugin’s Changelog.</p>


OTP Authenticator

One-Time Password Authentication for WordPress

Chandan Shrivastava

<p><strong>Email OTP Authenticator</strong> is a lightweight authentication plugin for WordPress that combines passwordless login, quick registration, optional 2FA and session protection into one flexible solution.</p>
<p>Built using independent security layers instead of a monolithic system, the plugin loads only the required components during use to keep runtime execution compact and avoid external service dependency.</p>
<h3>Delivering these key benefits:</h3>
<ul>
<li>Reduce login friction</li>
<li>Increase signup conversions</li>
<li>Reduce password reset requests</li>
<li>Strengthen multi-layered website security</li>
<li>Enhance user trust with secure authentication</li>
</ul>
<p>Designed to make WordPress authentication faster, smarter and more secure.</p>
<h3>Authentication Layers</h3>
<p>The plugin is engineered around three dedicated security Layers:</p>
<p><strong>Access Layer</strong></p>
<p>Handles secure user entry through passwordless authentication.</p>
<p>Features:<br />
* OTP Login<br />
* OTP Registration<br />
* Guest Verification<br />
* Email authorization<br />
* Fast Authentication Flow</p>
<p><strong>Validation Layer</strong></p>
<p>Adds identity confirmation and verification controls.</p>
<p>Features:<br />
* New Device detection<br />
* Auto-popup with UI lock<br />
* Parallel login validation<br />
* Two-Factor Authentication<br />
* Login Validity Enforcement</p>
<p><strong>Security Layer</strong></p>
<p>Protects active sessions and detects abnormal activity.</p>
<p>Features:<br />
* Dynamic Session Shield<br />
* Session Validity Check<br />
* Session Inactivity Lock<br />
* Adaptive 2FA Enforcement<br />
* Suspicious Activity Guard</p>
<h3>Lightweight By Design</h3>
<p>Built to stay lightweight.</p>
<p>Although the complete package includes templates, images and supporting resources for setup and compatibility, the actual authentication runtime remains compact.</p>
<ul>
<li>Admin Browser Load: ~97 KB</li>
<li>Admin PHP Runtime: ~564 KB</li>
<li><strong>Frontend Browser Load: ~68 KB</strong></li>
<li><strong>Frontend PHP Runtime: ~274 KB</strong></li>
<li>Templates & visual assets: ~2.1 MB</li>
<li>Distribution package (zipped): ~2.3 MB</li>
<li>Distribution package (unzipped): ~3.6 MB</li>
</ul>
<p>Only required components are loaded during use.<br />
No external APIs, frameworks or unnecessary scripts.</p>
<p><strong>Plugin runtime execution is highly optimized and fast.</strong><br />
<strong>However, overall performance also depends on external factors.</strong></p>
<h3>Key Highlights</h3>
<ul>
<li><strong>Quick Login & Signup</strong> – Instant, easy, and password-free; Login & signup with OTP.</li>
<li><strong>Built-in Two-Factor Authentication</strong> – Additional identity protection layer.</li>
<li><strong>Verified Access Control</strong> – Verify visitors without account for access to restricted pages.</li>
<li><strong>Adaptive Session Shield</strong> – Intelligent session protection engine.</li>
<li><strong>Zero External Dependency</strong> – Works without third-party services.</li>
<li><strong>Modern Vanilla JavaScript</strong> – No jQuery dependency.</li>
<li><strong>Flexible Integration Options</strong> – Add authentication anywhere.</li>
<li><strong>Complete Admin Control</strong> – Fine-tune authentication behavior.</li>
<li><strong>Built-in Interface System</strong> – Attractive ready-to-use templates.</li>
<li><strong>Lightweight & Fast</strong> – Optimized for performance.</li>
</ul>
<h3>Flexible Integration Options</h3>
<p>Add authentication forms anywhere on your website using simple integration methods.</p>
<p>Integration methods include:</p>
<ul>
<li>Shortcode integration (auto-popup, popup or inline forms)</li>
<li>Menu trigger integration (popup forms)</li>
<li>Redirect support for auto-popup & inline form pages</li>
<li>Multiple forms on the same page</li>
<li>Easy setup without coding complexity</li>
</ul>
<h3>Built-in Templates</h3>
<p>Attractive 27 ready-to-use templates with auto-popup, popup and inline support.</p>
<p>Easy-to-apply modern designs that match your website style, with options to customize pre-built templates or create your own.</p>
<h3>Complete Admin Control</h3>
<p>Customize authentication behavior, layout options, security restrictions and verification rules with ease. Admins gain complete control over user access and interaction across the website.</p>
<h3>Zero External Dependency</h3>
<p>Run a complete authentication system without relying on any third-party services.</p>
<ul>
<li>Full data control</li>
<li>Standalone operation</li>
<li>No external APIs required</li>
<li>Self-hosted OTP processing</li>
<li>Reliable authentication flow</li>
</ul>
<h3>Modern Architecture</h3>
<p>Built using modern development practices:</p>
<ul>
<li>Vanilla JavaScript implementation (no jQuery)</li>
<li>Modular resource loading</li>
<li>Secure token validation</li>
<li>Compact runtime execution</li>
<li>Optimized performance structure</li>
</ul>
<h3>Ideal Use Cases</h3>
<p>This plugin is ideal for:</p>
<ul>
<li>Membership websites</li>
<li>WooCommerce stores</li>
<li>SaaS dashboards</li>
<li>Community platforms</li>
<li>Agencies managing client websites</li>
<li>Developers needing flexible authentication</li>
<li>Beginners and small websites needing simple security</li>
</ul>
<p>Designed to scale from beginner websites to enterprise environments.</p>
<h3>Compatibility</h3>
<p>Works smoothly with popular WordPress tools:</p>
<ul>
<li>WooCommerce</li>
<li>Ultimate Member</li>
<li>MemberPress</li>
<li>BuddyPress</li>
<li>ProfileGrid</li>
<li>ProfilePress</li>
<li>User Registration</li>
<li>WP User Manager</li>
<li>Paid Memberships Pro</li>
<li>RegistrationMagic</li>
<li>Forminator</li>
<li>Login/Signup Popup plugins</li>
<li>And many more</li>
</ul>
<h3>Why Choose This Plugin</h3>
<ul>
<li>FAST – Quick OTP authentication process</li>
<li>FRIENDLY – Simple user experience</li>
<li>SMART – Intelligent access handling</li>
<li>SMOOTH – Clean UI integration</li>
<li>SECURED – Strong authentication protection</li>
</ul>
<h3>Basic Mode and Advanced Features</h3>
<p>Explore the default <strong>basic mode</strong> screenshots below, designed to be simple and beginner-friendly for non-technical admins. For screenshots of advanced integrations, customization, and extended functionality, visit the <a href="https://eotpa.cs7.in/docs/showcase.htm" rel="nofollow ugc">Plugin Showcase</a>.</p>
<h3>Support</h3>
<p>Feedback helps improve this plugin.<br />
Send suggestions or issues to:<br />
<a href="mailto:Mr.Chandan.Shrivastava@gmail.com" rel="nofollow ugc">Mr.Chandan.Shrivastava@gmail.com</a></p>
<h3>Notes</h3>
<p>This is the Lite version with advanced features included for exploration.<br />
Visit the <a href="https://eotpa.cs7.in/" rel="nofollow ugc">plugin homepage</a> to discover everything available across editions.</p>


Email OTP Authenticator – Login, Register, 2FA & Session Lock

A lightweight OTP-powered plugin for Login, Registration, 2FA Protection and Dynamic Session Security. It is FAST, FRIENDLY, SMART, SMOOTH & SECURE.

OTP Authenticator vs Email OTP Authenticator – Login, Register, 2FA & Session Lock